from collections import defaultdict
n = int(input())
A = list(map(int,input().split()))
mod = 10**9+7

dic = defaultdict(int)
dp = [0]*(n+1)
dp[1] = 1
now = 0
for i,a in enumerate(A[:n-1],2):
    now ^= a
    dp[i] = dp[i-1]*2 - dp[dic[now]]
    dp[i] %= mod
    dic[now] = i-1
print(dp[n])